Understanding the mechanism of uranium removal from groundwater by zero- valent iron using X-ray photoelectron spectroscopy

Joseph N. Fiedor; William D. Bostick; Robert J. Jarabek; James Farrell

doi:10.1021/es970385u

Understanding the mechanism of uranium removal from groundwater by zero- valent iron using X-ray photoelectron spectroscopy

Joseph N. Fiedor, William D. Bostick, Robert J. Jarabek, James Farrell

Research output: Contribution to journal › Article › peer-review

229 Scopus citations

Abstract

The contaminant of most concern in groundwater at the Oak Ridge Y-12 Plant's Bear Creek Valley Characterization Area is soluble uranium. The removal mechanism of soluble uranium from groundwater by zero-valent iron (ZVI, Fe⁰) was investigated. X-ray photoelectron spectroscopy (XPS, ESCA) was used to determine the uranium oxidation state at the Fe⁰ or iron oxide surface. Product speciation and relative reaction kinetics for the removal of soluble uranium under aerobic and anaerobic conditions with ZVI are presented. Under aerobic conditions, U⁶⁺ is rapidly and strongly sorbed to hydrous ferric oxide particulates ('rust'), whereas U⁶⁺ is slowly and incompletely reduced to U⁴⁺ under anaerobic conditions.

Original language	English (US)
Pages (from-to)	1466-1473
Number of pages	8
Journal	Environmental Science and Technology
Volume	32
Issue number	10
DOIs	https://doi.org/10.1021/es970385u
State	Published - May 15 1998

ASJC Scopus subject areas

General Chemistry
Environmental Chemistry

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title = "Understanding the mechanism of uranium removal from groundwater by zero- valent iron using X-ray photoelectron spectroscopy",

abstract = "The contaminant of most concern in groundwater at the Oak Ridge Y-12 Plant's Bear Creek Valley Characterization Area is soluble uranium. The removal mechanism of soluble uranium from groundwater by zero-valent iron (ZVI, Fe0) was investigated. X-ray photoelectron spectroscopy (XPS, ESCA) was used to determine the uranium oxidation state at the Fe0 or iron oxide surface. Product speciation and relative reaction kinetics for the removal of soluble uranium under aerobic and anaerobic conditions with ZVI are presented. Under aerobic conditions, U6+ is rapidly and strongly sorbed to hydrous ferric oxide particulates ('rust'), whereas U6+ is slowly and incompletely reduced to U4+ under anaerobic conditions.",

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AU - Fiedor, Joseph N.

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AU - Farrell, James

PY - 1998/5/15

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AB - The contaminant of most concern in groundwater at the Oak Ridge Y-12 Plant's Bear Creek Valley Characterization Area is soluble uranium. The removal mechanism of soluble uranium from groundwater by zero-valent iron (ZVI, Fe0) was investigated. X-ray photoelectron spectroscopy (XPS, ESCA) was used to determine the uranium oxidation state at the Fe0 or iron oxide surface. Product speciation and relative reaction kinetics for the removal of soluble uranium under aerobic and anaerobic conditions with ZVI are presented. Under aerobic conditions, U6+ is rapidly and strongly sorbed to hydrous ferric oxide particulates ('rust'), whereas U6+ is slowly and incompletely reduced to U4+ under anaerobic conditions.

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Understanding the mechanism of uranium removal from groundwater by zero- valent iron using X-ray photoelectron spectroscopy

Abstract

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